Communication

"Mobile devices rely on their ability to communicate both with each other and with fixed devices such as
personal computers. At times this communication is direct, but at other times a mobile phone (cell phone)
network is used. There are various methods of communication, each with its own protocol, and each
providing certain advantages and disadvantages when compared with one another." IBO

Bluetooth
WiFi
Mobile networks
Infra Red
USB
Ethernet
WiMax
Firewire
Comparison of Communication Networks